Fluid seal



June 12, 1945. F. E. PAYNE 237,095

FLUID SEAL Filed April 27, 1942 r s ed June 12, 1945 "UNITED STATE sPATENT VVZOFFICE.

FLUmsnsL Frank E. Payne, Winnetka, 111., assignor to Crane PackingCompany, Chicago, lll., a corporation of Illinois Application April 27,me, Serial No. 440,052

2 Claims. (01. zson 'Ihis inventionrelates in general ton fluid seal forshafts, bearings, and the like, and is more particularly described as aseal for a water pump.

An important object of thevinvention is in the provision of arubber-like sealing member preferably in the form of a ring adapted tobe compressed or preloaded upon a shaft or another In the side oppositethe washer .is a recess II to receive the extremity of a coil spring I!which is seated therein, one end bearing against the recess andv theother bearing against a rotating member to which it is applied andcombined with an anti-frictional washer or member having a recess orgroove to receive the sealing member and compressed therein by a springseated in a groove or recess of the sealing member.

A further object of the invention is to provide a fluid seal ,whichcomprises a doughnut type sealing member adapted to be'preloaded upon ashaft or other circular member. and having a recess or groove in which acompression spring is seated for additionally holding it in sealing.Position.

Other objects oi' the, invention will appear'in the specification andwill be apparent from the accompanying drawing, in which Fig. l is asectional view showing a seal in accordance with this invention asapplied to a shaft;

Fig. 2 illustrates a modification of the seal; and

Fig. 3 shows a seal similar to Fig. 2 with a retaining ring.

In a fluid seal for a pump, it is customary to provide; ananti-frictional washer or discwhich 1 makes a fluid tight engagementwith a fixed portion, usually one end of the bearing in which a shaft ismounted to rotate the disc with respect to the bearing, and to make afluid tight connection between the opposite faceof the disc and theadjacent surface of the shaft which are relatively at right angles toeach other. This .is accomplished in the present invention bypreloading-a circular ring or doughnut type of sealing member ,upon ashaft so that only a small portion of the ring is slidable on orinengagement with the v shaft and in compressing the ring by means of aspring against the surface of the sealing disc or in a formed recess inthe disc such that compression of the sealing ring by the spring willtend also to expand the seal tightly against the shaft as well asagainst the anti-friction washer.

Referring now more particularly .to Fig. .1, a rubber-like seal 4 of thedoughnut type partially circular in cross section is compressed or pre-[loaded upon an inner flattened surface 5 on a '50 shaft 8. This ring isseated in a recess 1 of an anti-frictional disc 8 curved tosubstantially fit the circular cross section of the seal and having aside wall 9 and a bottom wall It at right angles to each other andsubstantially containing the seal therein.

member I! secured to the shaft. At one side of the recess. the outeredge of the seal has a rounded projection II extending away from theshaft and at the opposite side of the recess is a rectanguy larprojection l8 adapted to fit against the side wall-9. The spring [2tends to spread the sides of the recess II when compressed At itscontact face, the anti-frictional disc 8 engages a flxed bearing it forthe shaft, the relatlon of the parts being such that as the shaft is."-

2, a sealing member 20 is also partially circular in cross section,preloaded, or compressed upon the shaft, it has a straight wall II atright angles to the shaft which bears against a flat contact surface ofa sealing disc 22 which in turn makes ,a water tight sliding connectionwith a fixed bearing 23 of the shaft.

In the side of the member 20 opposite the shaft and the disc is a rightangled groove or recess 24 engaged on the side opposed to the disc by acoil spring which abuts the bottom of arecess 26,

of a member 2'! secured to the shaft. If desired,

this member may have a flange with projections 28 for engagingearsjaformed on the disc 22 for rotating it with thershaft and seal.

In the form of theinvention shown in Fig. 3.

a retaining ring III of metalor any other suitable material isinterposed between the end' of the spring 2! andthe angular groove 24 inthe sealing member; o

' All of these forms have the advantage that only a small portion of thesealing member is sliding or contacts with the shaft, and when thesealing inember is additionally compressed by a spring seated in agroove, the lips or edges of the sealing member are pressed against theshaft and Joint.

against the sealing disc or washer at right angles to each other,tending thereby to make a more dependable seal and to maintain a fluidtight Iclaim: 1. A shaft seal, comprising an anti-friction sealing ringto fit loosely about a shaft and having a recess in one face forming aquarter-round groove surrounding the shaft; a ring of rubber- I likesealing material partially circular in crossto fit loosely about a shaftand having a circular recess in one face rounded at the bottom, arubher-like sealing ring preloaded upon the shaft and seated in therecess, the ring having an angular outer rib to fit the wall oi! therecess and flush with the edge thereof and otherwise round incross-section to engage the shaft and the bottom of the recess, theexposed edge of the ring when seated in the recess having a centralgroove extending inwardly parallel to the shaft, and a coil spring ofwire having an extremity to fit within the said groove, the depth of thegroove being greater than the diameter of the spring material whichtends to prevent the ring from tippin over and keeps it centered in therecess.

FRANK E. PAYNE.

